Sensor technology in today's world is a remarkable one of the rapid development of high and new technology, is an important symbol of the contemporary science and technology development. Sensor is a kind of to physical quantities, such as chemical content, biomass is transformed into electrical signal device. Its output signal has a different form. Such as: voltage, electric current, pulse, frequency, etc, can satisfy the information transmission, processing, record, display and control requirements. Therefore, the sensor is automatic test system and automatic control system is an indispensable element. It can be measure the size of the right feeling is converted into the corresponding output, and decisive role in the quality of automatic control system. The development of sensor technology with each passing day, especially since the 80 s the human by the highly industrialized into the information age. Sensor technology to update, higher technology development. Foreign sensor technology research, development and application development soon, they not only attaches importance to new product development, also pay attention to material, design, production technology and the development of the process equipment, and has become a new industry. Particularly in the United States, Japan and other developed countries sensor technology development was the fastest. The United States as early as the 80 s claimed that the world has gone into the era of sensor. And Japan is the creation of sensor technology as the top ten. The world technology to the development of sensor technology in the developed countries attach great importance to.

Sensor is the basis of industrial measurement and control system and information system components. The distinctive characteristic of a new generation of sensor is multi-functional and intelligent, digital, array, miniaturization and systematic. Sensors under the demand of the whole system affects, but, in turn, can promote the development of the whole system. A new kind of sensor, then there will be a new machine and a new system. Because the sensor is the access to information portal system. I.e., it is in the service of the machine system. It needs by traction or restrict the whole machine system. The higher the degree of automation, the higher requirement for the sensor system. Many developed countries of the world are speeding up research and development of new technology of sensor, and both have made a great breakthrough. Reason is that in today's information age, computer technology and communication technology are in rapid development, not only for the accuracy and reliability of the sensor, the response speed, the information demand is higher and higher, but also for the sake of their low cost, and easy to use. It is obvious that the traditional sensor due to the characteristics, function, reason has been difficult to meet the requirements, such as volume, cost and will gradually be eliminated.

Sensor is an important technology of the new technology revolution and the current information society, is the pioneer of modern science and technology. It is paid attention to by all countries in the world and put into development, sensor development is very rapid, denier and market demand in recent decades the annual growth rate in more than one turn. The total demand to domestic sensors in China has been growing steadily. Therefore, our country should further strengthen the study of sensor technology, development and investment, shortening gap sensor technology in China and abroad, thus promotes our country instrumentation industry and the development of automation technology.